Work

Thermomagnetic convection in a stable circular Couette ferrofluid flow with a radial temperature gradient

Year: 2025

Type: article

Abstract: Linear stability of a ferrofluid flow in a cylindrical annulus with an outward heating and an imposed magnetic field is investigated for Rayleigh-stable regimes: the sole rotation of the outer cylinder and the solid body rotation of both cylinders. The magnetic field produced by a stack of magnets located inside the inner cylinder coupled with the radial temperature gradient generates the Kelvin force whose non-conservative term acts as a thermal buoyancy with a magnetic gravity and can destabilize the flow, even in the microgravity conditions. The critical parameters of thermomagnetic convection induced by this force are determined for water-based and oil-based ferrofluids corresponding to different diffusive properties. An energy analysis is performed to evaluate the role of the different mechanisms responsible for the flow destabilization.

Source: The European Physical Journal Special Topics

DOI: 10.1140/epjs/s11734-025-01908-1

Authors: Antoine Meyer, Anupam M. Hiremath, Changwoo Kang, Innocent Mutabazi

Institutions: Centre National de la Recherche Scientifique, Université Le Havre Normandie, Laboratoire Ondes et Milieux Complexes, Jeonbuk National University

Language: English

Topic: Fluid Dynamics and Turbulent Flows

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,790

Funders: Agence Nationale de la Recherche, Centre National d’Etudes Spatiales, Centre National de la Recherche Scientifique, Région Normandie